They Will Answer to the Cry " Watchman, What of the Sun? " A decline of between three and four per cent in the heat radiated by the sun to the earth during the last 15 months startled the weather sharps who heard it announced by Dr. Charles Greeley Abbot, home secretary of the National Academy of Sciences, in a paper before the annual meeting of that body in Washington. He characterized the drop as " extraordinary " and as the most outstanding change which has been observed since measurements of the sun's...
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